Can Eczema cause bruising, if so how can I prevent it?

Skin problems are symptoms but problem is inside body. This is inflammation. You must to treat the consequences, not the causes. People are different but the principle is the same - you must lose the cause of the disease! Once again- I had psoriatic arthritis with diagnosis L40.0(-) and now I’m fine using a new 100% natural Omega 3 product from a North-European producer (they promise a ratio of 3:1 or lower). As I was sceptic I measured, and still do, Omega 3 effect and Omega 6:3 ratio due to its importance.

I use a blood test from leading independent laboratories. This is a simple dry blood-spot test for home sample collection. Leading laboratories analyze the sample to determine your fatty acid profile as a reflection of your diet. The balance test identifies levels of 11 fatty acids in the blood with 98% certainty. You will learn your blood levels of omega-3 and your ratio of omega 6:3 for balance, plus receive a report to increase your health and dietary awareness. Test results will show whether your diet is balanced or unbalanced.

My first test ratio was 8,4:1, second after four months 3,4:1 and third a year later 1,6:1 and I´m fine.

Finally, if you hold a ratio 3:1 or lower then all life style diseases (skin, joints, asthma, allergies, diabetes 2, high blood pressure, thyroid, osteoporosis, cardiovascular diseases etc.) will start disappearing and I know lot of recovered people now. 

if you don't get a satisfying reply here - google your condition (before approaching  your doctor, and get a second opinion if you have doubts.) How are you dealing with your eczema? Steroid cream thins the skin and thin skin bruises easily. Get back.